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Electrical connection
6.11 Connecting the power unit
Table 6-1
Materials required
Cleaning agent
Grease
Procedure
1. The cable entries for the power cables are covered with aluminum plates. Remove the covers.
2. Route the power cables through the openings in the power unit.
3. Anchor bars are provided for strain relief. On the system side, only use clamps that are
suitable for the short circuits that could potentially occur.
4. Fix cable sealing ends to the power cables.
5. Screw on the power cables. The connection busbars are labeled with the phase designation.
6. Connect the shields of shielded cables to ground on the transformer or the motor. Do not
connect the power cable shields at the converter side.
7. Seal the remaining openings where the cables enter the cabinet in accordance with the
degree of protection.
6.11.2
Connecting the signal cables
There are terminal strips and interfaces on the Power Stack Adapter in the electronics
compartment of the power unit. The signal traffic to the open-loop and closed-loop control
cabinet is handled via these interchange points.
The terminal blocks are used to wire up the following:
• Signals
• Auxiliary voltage for fans and anti-condensation heating systems
• Power supply for the electronics
Procedure
To connect the signal lines, proceed as follows:
1. Connect the signal lines at the intended clamping points.
2. Connect the shield to the shield bus as shown under Using the equipotential bonding strip
and shield bus (Page 89). Refer to the "Circuit manual for power unit" for the precise
assignment. Pay attention to the EMC directives.
92
Cleaning agents and grease
Ethyl alcohol
2G from Elektrolube
3rd Party LCI Control Upgrade
Operating Instructions, 02/2022, A5E31872818
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